In this paper, a new approach is proposed to detect broken rotor bars in in
duction motors. The motor is disconnected from the supply, and the induced
voltage in the stator due to only rotor flux is utilized to detect the faul
t. If there is any broken bar, it will directly affect the induced voltages
in the stator windings, Using this approach, the effects of source nonidea
lities (such as unbalance, presence of time harmonics, etc.) and nonlineari
ty of machine magnetizing characteristics due to saturation can be avoided.